| Abbreviation | Definition |
|---|---|
| CRES | Cotee River Elementary School |
| CRES | Crystal River Elementary School |
| CRGS | Central Region Gliding School |
| CRGS | Clitheroe Royal Grammar School |
| CRGS | Colchester Royal Grammar School |
| CRHS | Canyon Ridge High School |
| CRHS | Cedar Ridge High School |
| CRHS | Centennial Regional High School |
| CRHS | Central Regional High School |
| CRHS | Charlottetown Rural High School |
| CRHS | Cinco Ranch High School |
| CRHS | Coginchaug Regional High School |
| CRHS | Columbia River High School |
| CRHS | Coon Rapids High School |
| CRHS | Coral Reef High School |
| CRHS | Cossatot River High School |
| CRHS | Crystal River High School |
| CRHS | Cumberland Regional High School |
| CRIBS | Christian Resources In Bexley Schools |
| CRLA | Costa Rican Language Academy |